rcv 分析:
/* The socket must have it's spinlock held when we get
* here, unless it is a TCP_LISTEN socket.
*
* We have a potential double-lock cas ......
select @csum := 0;select create_time,merchant_id,award as 奖励,total_count as 数量,(@csum := @csum + award*total_count) as 累计 FROM aty_award_task wh ......